Re: PDP8 / ETOS

[Rick Murphy]

At 01:22 PM 10/17/2015, David Gesswein wrote:
On Fri, Oct 16, 2015 at 11:03:51PM -0400, Rick Murphy wrote:
System users guide pg 4-10. Fortran IV. Real time functions and floating
point processor functions are not currently supported. The internal
device handlers for high speed reader/punch and card reader are not 
supported.
Device independent I/O must be used to access these devices.

I don't know if that means the floating point instrutions won't work but
the software emulator fallback will or any attempt to use floating 
point will
fail.

The Fortran IV compiler emits FPP code, so what that has to mean is 
that you can't use a hardware floating point unit and must use the 
built-in emulator. That makes sense, as the FPP code has built-in 
15-bit addresses that won't get swizzled by the ETOS time-sharing option.

Guess I'll try to get a round tuit and bring up ETOS on my PiDP-8 to 
see if it can be made to work.
    -Rick